ata8: Classification failed

[Fafnr]

I'm hoping this is the right forum - if not, I'm sure someone will set me right.

I just installed 8.04 (yay!) but unfortunately, it seems to dislike one of my drives intently.
During boot (I disabled the splash-screen so I would get more info) it says:
ata8: Classification Failed
and then retries several times. First at 10 sec intervals, then 35. All this means a boot takes me roughly 5-6 minutes... Completely unacceptable.

This probably isn't an Ubuntu problem per se - might just be something I did, or a drive-check I need to run or something... But I have no idea.

Any thoughts are welcome!

Regards,

Søren

[Fafnr]

This is really serious - at least for me - so: bump.

[Fafnr]

Some further information:

ata4: classification failed
ata4: reset failed (errno=-22), retrying in 10 secs

and so on... Please! ANYONE!
What can I do?

[sgroarke]

Hi Soren

Are you still getting this, 'cos I've got a completely knackered system with the same thing!

What I get is the same sort of message as you, but the ata8 is sometimes another number (ata4, etc.)

It tries several times, then it all times-out and falls through to a busybox shell.

Yet I can boot off the 'old' kernel (pre-8.04) fine.

One question: my system has a mix of SATA disks and IDE disks, and some funky grub config to allow the dual-boot environment I need (and under 7.10 it all works fab). Do you have anything similar I wonder?

Cheers,
Sean

PS I have upgraded 3 (very different) system to 8.04 in the last week or so and each one has gone very badly (albeit in very different ways) The Ubuntu guys have some serious quality issues with the upgrade process...

[Fafnr]

Hello sgroarke,

Yes, I'm still having the same problem, though I have yet to update my Ubuntu-installation with any new packages since release. I don't have the patience to wait for it to boot, TBH.

I havn't tried an earlier Ubuntu version, but I DID have Kubuntu 7.10 for a while, before deciding to try Ubuntu 8.04 - and that booted just fine.

I too have a funky combination of SATA and PATA disks, though I havn't looked in the grub configuration - Ubuntu handled all that very nicely without me having to look at the gritty details, luckily. I am running on an MSI Neo Platinum (I forget which it is exactly, but it runs with a Core 2 Duo) with the newest BIOS (I think 1.18 or 1.19), and 2gb of RAM.

I upgraded my Laptop from 7.10 to 8.04 without any problems (luckily!) but I too have had strange problems in 8.04 that detracts from my "it just works"-perception of Ubuntu. :/
Though probably not all of it is Canonicals fault - like Firefox 3 constantly crashing, or every single icon flickering for 5 seconds when opening the lid of my laptop - it's still very annoying.

Please, should you come upon any information on how to fix this, I would be very grateful if you posted it here!

Regards,

Søren Andersen

[sgroarke]

I have done a *lot* of research in to this issue in the last few days and I must say it is, to coin a very English phrase, a "can of worms".

When digging in to this one finds that there is a long history of issues with the pata_jmicron driver. The symptoms vary a lot, but all seem to boil down to variations on "takes a long time to work" or "stops working after a while".

Like you, Ubuntu 7.10 worked fine for me. That was kernel 2.6.22. But it looks like 2.6.24 (used in 8.04) has some catastrophic jmicron bugs.

At first I assumed it was just a Ubuntu issue (and the fact they did not spot it in testing is a fault against them!) but it turns out it's widespread. I took the recent Fedora 9, released a few days ago, and it has *exactly* the same issue. Guess what? It's using 2.6.24 too...

I even yesterday built a stripped-down kernel for 2.6.24. Very minimal. Almost no modules - everything built-in (including the jmicron stuff). Guess what? Just as useless.

This is a bone-fide non-Ubuntu-specific kernel bug. If I had more time I'd look more deeply into fixing it. But frankly, why bother? Being a pragmatist, just deinstall the 2.6.24 kernel from 8.04 and use the 2.6.22 kernel. The chances of you (or I or anyone) actually needing something in 2.6.24 not present in 2.6.22 is very very small...

Sean

[Fafnr]

I have to admit - I'm impressed! I'm the lazy kind of linux user - the kind that, if it doesn't work, spends about an hour trying to figure it out, and then goes back to something that actually works! (BTW - wasn't that the original argument for going from Windows to Linux? I forget.

Anyway, 'tis nice to know it's not just Ubuntu that's the problem.

Thank you for looking so deeply into this - I have to admit that I don't yet feel confident building my own kernels (well... At least I'm too lazy to spend the time needed to understand what to do and I didn't even think of trying another distribution to see if the bug was present there as well!

As soon as I get home, I'll try downgrading my kernel - hopefully I can then enjoy Ubuntu outside of my Laptop

Regards,

Søren Andersen

[Fafnr]

So, I'm home and I want to install the 2.6.22-14 kernel - how do I do that, seeing as it's not in the repository?

Regards,

Søren Andersen

[Fafnr]

Using packages.ubuntu.com I installed the 2.6.22-14 generic kernel.
However, after installation, my graphicscard is no longer recognized, and I can only run in 800 x 600 or 640 x 480...

I guess I will have to wait for some kernel-update, before I can use Linux with my Desktop...

/Soren

[Jugalator]

I also started getting this just now, ata4: Classification failed, a few retries, messages on that it can't reset "ata4", and finally a message on "limiting speed to x Gbps", but still having the boot stall. A reboot and still the same thing. I'm using Ubuntu 8.04 and everything worked fine the first week or so.

I haven't reconfigured neither my hardware nor any "depths" of the system. The only file I've really touched would be the grub boot config file to change a boot device, but that was a while ago and didn't cause any ill effects at the time.

So I wonder what the trigger is.

I also have a mix of ATA (my DVD) and SATA (hard drives) devices, and all I'm really wondering right now is which of those devices "ata4" might be for me... I don't even use that many ATA devices, if it's enumerating them from ata1, that is.

Edit: Moonswan has some info, but no actual fix, here on the Arch Linux forums (obviously a cross-distro issue): http://bbs.archlinux.org/viewtopic.p...360567#p360567